<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src='./echarts.min.js'></script>
</head>

<body>
    <div id="box" style="width: 60%;height: 400px;"></div>
</body>
<script>
    var aaa = document.getElementById('box');
    var myeach = echarts.init(aaa);
    var option = {
        title: [{
            text: 'Radial Polar Bar Label Position (middle)'
        }],
        polar: {
            radius: [30, '80%']
        },
        radiusAxis: {
            max: 4
        },
        angleAxis: {
            type: 'category',
            data: ['a', 'b', 'c', 'd'],
            startAngle: 75
        },
        tooltip: {},
        series: {
            type: 'bar',
            data: [2, 1.2, 2.4, 3.6],
            coordinateSystem: 'polar',
            label: {
                show: true,
                position: 'middle',
                formatter: '{b}: {c}'
            }
        },
        backgroundColor: '#fff',
        animation: false
    }
    myeach.setOption(option)
</script>

</html>